Upon her marriage to Martok, she moved into his house. She left the door of the house open, allowing Martok's pet targ to escape. Even though she was responsible for the loss of the creature he had had since he was a boy, Martok later told Benjamin Sisko he would "not trade Sirella for all the targs on Qo'noS." (DS9: "Strange Bedfellows")

Although she was completely different from the woman Martok thought he would marry (he thought of her as a mercurial, arrogant, prideful woman who didn't have sex with him as much as he wanted to), his love for her was very deep. (DS9: "You Are Cordially Invited")

A proud and headstrong woman, Sirella was originally opposed to the marriage between Worf and Jadzia Dax, believing that by allowing aliens to join her house would threaten their identity as Klingons. Since as mistress she had the duty of approving all marriages into the family, she came to Deep Space 9 to evaluate Dax's worthiness. Sirella's views led her to set Dax's standards impossibly high, eventually causing a clash between them and to her canceling the wedding. Dax eventually begged her forgiveness, changing Sirella's mind about her. Sirella later performed the wedding ceremony. (DS9: "You Are Cordially Invited")

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The casting of Sirella pleased Martok actor J.G. Hertzler. He reminisced, "When I heard that Shannon Cochran was going to play her, I said, 'Perfect!' because she has a Shakespearean background and I knew we could really feed that into the two characters' relationship." Indeed, the portrayal of Sirella's relationship with Martok was influenced by the connection between Beatrice and Benedick in Shakespeare's "Much Ado About Nothing". (Star Trek: Deep Space Nine Companion, p. 504)

Ron Moore was additionally happy with the way Sirella supervised the Klingon wedding ceremony in "You Are Cordially Invited". "Sirella really delivered the ceremony with all the dignity and panache I was hoping for," Moore related. (Cinefantastique, Vol. 30, No. 9/10, p. 44)